If you want to grow your numbers then you really need to get heavily involved in social media. Just putting the links on here - you'll get a few listeners out of goodwill (not sure how long they need to stick around to constitute a hit) but we don't have an especially large userbase and a good chunk of them will never even open this thread.
Sounds easy just plugging your own stuff forever but you need retweets, recommends, follows, likes, plugs from bigger accounts and then run from there. Think of what you're doing that's unique and try to plug into that - if there's a Pixies hour going on, in advance find some big Pixies fan accounts on Twitter, take down the usernames, tag them in. Might get nowhere but it'll massively increase your chances. You're essentially throwing a lot of darts semi-blindfolded and hoping enough hit. If you're good enough then it will pick up.
Good luck to you man.